Spectrum Server disk occasionally fills up because the NCMSERV.OUT file grows excessively large on Fault Tolerant Secondary

Products

• Network Observability
• Spectrum

Issue/Introduction

Spectrum Server disk occasionally fills up because the NCMSERV.OUT file grows excessively large on Fault Tolerant Secondary

java.lang.Exception: <number>

255

Failure

at com.aprisma.spectrum.scmd.RunScript.captureRunning(RunScript.java:227)

at com.aprisma.spectrum.scmd.ScmServiceImpl.captureConfigScriptImpl(ScmServiceImpl.java:938)

at com.aprisma.spectrum.scmd.ScmServiceImpl.captureRunningConfigRun(ScmServiceImpl.java:470)

at com.aprisma.spectrum.scmd.ScmServiceImpl$1.run(ScmServiceImpl.java:4155)

at java.base/java.lang.Thread.run(Unknown Source)

 

Environment

Spectrum 24.3.x, 25.4.x

Cause

• Engineering identified that a specific Spectrum NCM Policy triggered an exception that causes NCMSERV.OUT to grow rapidly.
• This issue is more prevalent on secondary Spectrum server because they often restart daily for online backups, which triggers the problematic policy execution upon startup.

Resolution

Fix to be included in the July Spectrum release which is 25.4.10, if it slips it would be 25.4.11.